Pad, cushion or the like



Oct. 6,1931. w D EHL v 1,826,304

PAD, CUSHION, OR THE LIKE Filed March 13, 193].

I Jnven/Or:

by: A

orney.

Patented Oct. 6, 193 1 HPAI-TENT OFFICE w CONRAD DIEHL, F EEBOLDSBERG, GERMANY PAID, CUSHION OR THE LIKE Application filed March 13, 1931, Serial No. 522,361, and in Germany February 5, 1931.

This invention relates to pads, cushions and the like, such as for instance disclosed and claimed in my co-pending application for United States Patent, Serial No. 471,182

5 (Series of 1925) and consists in a furtherimprovement on pads or cushions of this kind.

The pad or cushion according to my present invention consists, similarly to the pad or cushion forming part of my aforementioned co-pending application essentially of a plurality of layers of which the outer layers serve as coverings and the inner layer or layers as a filling for the pad or cushion. 3.3 According to my present invention, now, the several layers of which the pad or cushion is composed are united with each other by means of a-rim which is compressed along a wave-shaped line-which may be of various conformationsto fully and securely close up and fix to each other the several layers at the'rim of the pad or cushion.

it the pad or cushion is made with a rim which is compressed flat alonga non-undulating line as described and claimed in my aiorementioned co-pending application, there will be the possibility that the compression at the rim becomes nonuniform, the degree of non-uniformity depending upon the materials used as well as upon the width of the compressed rim and the pressure which hadbeen applied thereto duringthe process of compression. in consequence of this, the

union or coherence of the several layers of which the pad or cushion is composed may be destroyed during use with the result that especially the coverings or outer layersbecome loose rendering the pad or cushion in the first place unsightly and in the second W place more or less unsuitable for use.

I have found that especially the coverings or outer layers cf the pad or cushion constructed according to my aforementioned application for U. S. patent become loose,

pad is only narrow, in diametrical direction of the pad, and if it had been necessary to apply very high pressures upon the rim of the pad in order to unite the several layers thereoi.

if the zone of compression at the rim of the Experiments have further shown that the compressed rim of the ad and therewith I the union of coherence o the several layers may be essentially improved and the practical value of the pad considerably enhanced, 66 if the pad is com ressed along its rim not in a plane -as descri d in my aforementioned co-pending application, but if the rim is compressed along a wave-shaped line which may be of various specific conformations.

Evidently, by compressing the rim of the pad according-to my present invention along a wave shaped line, the absolute length of the line along which the rim is compressed will be considerably increased, as compared m with a line of compression'within a plane, said increase of the absolute length of the line of compression amounting to about from 30 to as compared with a line of compression in a plane, this increase of the abto solute length of the line of compression depending upon the degree of undulation which according to my present invention is given to the line of compression along the rim of the pad. p

When using the term wave-shaped line of compression or the like I desire of being understood that l wish to imply thereb every form of a line of compression whic is longer than any line of compression parso allel to the periphery of the pad.

The wave-shaped line of compression along the rim of the padaccording to my invention may, for instance, be of zig-zag. confor-' mation, either with sharp or rounded zig- 86 z ags, or the line of compression may follow a line composed of subsequent semi-cii'cles or the like, without departing from the principles of my present invention or sacrificing any advantages thereof.

In the accompanying drawings I have represented a pad or cushion composed of a plurality of layers, preferably of cellular matev rial, said layers being united with each other along the rim by exerting a suitable pressure thereon along a wave-shaped line of compression which line may be of various conformation. Fig. 1 shows the new pad as being of round conformation, the several layers being united with each other-along a wave-shape line of compression following essentiallythe circumference of the pad, Fig. 2 is a sideview taken on Fig. 1, while Figs. 3 to 7 show various forms of the wave-shaped line of circles, Fig. 6 a line of compression composed of waves following a rectangular zig-zag conformation and Fig. 7 another line of compression following a line composed of waves of a shape intermediate the sharp zig-zag shown in Fig. 4 and the rectangular zig-zag shown in Fig. 6.

As may be seen from Figs. 1 and 2, the compression of the several layers near the rim of the pad or cushion is carried out in such a manner that the rim of the pad is compressed within a small zone along the circumference along a line of compression which may be of any of the forms of waves shown in Figs. 3 to 7. When uniting the several layers of the pad according to my present invention by applying pressure to the rim of the pad or cushion along a line of wave-shaped conformation, evidently the length of the line of compression will be considerably increased, as compared with the line of compression following-essentially a plain circular line or any line of a conformation following essentially the conformation of the rim of the pad. In addition to the considerable increase of the length of the line of-compression along which according to my present invention the several layers of the pad are united with each other by pressure, there will be obtained a further advantage which consists therein that, when applying pressure to the layers in proximity to the rim along a line of compression of wave-shaped conformation, the several layers of the pad will be caused to eX- pand during applying pressure thereto, with the result that the mechanical union or coherence between the several layers will be greatly improved owing to the fact that the portions of the several layers which are so compressed near the rim will be more firmly united by a process which may be compared with a process of felting, said process taking place at those portions of the several layers which are united with each other by pressure along a line of compression having a waveshaped conformation. This process of felting which takes place in the present case is so effective that a separation of the several layers compressed along a line of wave shaped conformation and especially a separation of the coverings or outer layers will be avoided Y with a great degree of certainty, even in case of rough handling of the pad or in case of at portions of thc layers which are united by pressure near their circumference along a line of compression of wave-shaped conformation, the waves of said line of compression being directed transversely to the plane of the pad or cushion.

3. A pad, cushion or the like consisting of layers which are united by pressure near their circumference along a line of compression of wave-shaped conformation, the line of com pression being of rounded wave-shaped conformation with the waves directed transversely to the plane of the pad or cushion.

4. A. pad, cushion. or the like consisting of layers which are united by pressure near their circumference along a line of compression of wave-shaped conformation, the line of compression being of zig-zag conformation in a direction transversely to the plane of thepad or cushion.

5. A pad, cushion or the like consisting of layers which are united by pressure near their circumference along a line of compression of wave-shaped conformation the line'of compression being of a conformation composed of semi-circles directed transversely to the plane of the pad or cushion.

In testimony whereof I affix my signature.

conaan Diana.

Ill) 

